package string;

public class StringAnDStringBuilderDemo {
    public static void main(String[] args) {
    /*String str = "a";
    for (int i = 0 ; i < 10000000 ; i++){
        str = str + "a";
        }
        System.out.println("执行完毕");

     */
        StringBuilder builder = new StringBuilder("a");
        for (int i = 0 ; i < 1000000 ; i++){
            builder.append("a");
        }

    }
}
